<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:state_pressed="false" android:drawable="@drawable/btn_zoom_up_normal" />
	
	<item android:state_pressed="true"  android:drawable="@drawable/btn_zoom_up_pressed"/>
</selector>